The Simply RFID01 is a reliable signal-blocking pouch, perfect for safeguarding car keys and electronic devices from unwanted radio frequency signals. Its compact size of 8 inches by 4 inches makes it convenient to carry, while its durable construction ensures complete signal isolation. A must-have for anyone seeking enhanced security for their keyless entry systems. Keep your belongings safe and secure with this Simply Auto RFID Key and Phone Blocker. The signal-blocking capabilities protect you from hacking and radio frequency theft, making it a perfect choice to hold your car keys, key fobs, mobile phone, access cards and more. This compact pouch can be easily stored in your pocket for security and peace of mind out and about.